Image forming apparatus

Abstract

An image forming apparatus having a sheet feeding structure for feeding a sheet fed out by a feed-out roller to a pair of resist rollers via a pair of feed rollers, wherein after a leading edge of the sheet comes to the pair of resist rollers, the sheet temporarily curves in a sheet path, between guide members disposed to face to both sides of the sheet. One of the guide members that is disposed downstream from the pair of feed rollers has a convex and a concave. The convex protrudes almost to the normal of the nip portion of the pair of feed rollers. The concave is disposed upstream from the convex with respect to the sheet feeding direction.

1 . An image forming apparatus comprising a sheet feeding structure for feeding a sheet fed out by a feed-out roller to a pair of resist rollers via a pair of feed rollers, wherein after a leading edge of the sheet comes to the pair of resist rollers, the sheet temporarily curves in a sheet path, between guide members disposed to face to both sides of the sheet,
 wherein one of the guide members that is disposed downstream from the pair of feed rollers with respect to a sheet feeding direction has a convex and a concave;   wherein the convex protrudes substantially to a normal of a nip portion of the pair of feed rollers; and   wherein the concave is disposed upstream from the convex with respect to the sheet feeding direction.   
     
     
         2 . An image forming apparatus according to  claim 1 , wherein the convex is formed such that a top of the convex is located downstream from the pair of feed rollers with respect to the sheet feeding direction at a distance smaller than (½)L and greater than (¼)L, wherein L is a distance between the pair of feed rollers and the pair of resist rollers. 
     
     
         3 . An image forming apparatus according to  claim 1 , wherein the guide member having the concave and the convex is disposed in an opposite side of the feed-out roller.